[ubuntu-mono] [Bug 654742] Re: Gross mistake about palindromic years

Daniel U. Thibault 654742 at bugs.launchpad.net
Fri Oct 8 19:32:53 BST 2010

"Usually" implies more than 50% of the time, which is incorrect.
Palindromic years do NOT occur at 11 year intervals "at the end of each
millennium".  They only do so during the first century of the calendar.
(In rewriting this answer, it finally dawned on me what this was trying
to say...Poorly expressed, in my opinion)  A correct sentence would be:

"From year 1.001 to year 9.999, palindrome years occur at 110 year
intervals, with a single 11 year interval at each millennium turnover."

(repeat of a private e-mail that somehow wasn't echoed here)

Gross mistake about palindromic years
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Status in “gbrainy” package in Ubuntu: Fix Committed

Bug description:
Binary package hint: gbrainy

games.xml.h includes the answer:

Palindrome years occur usually at 110 year intervals except for the end of each millennium that occur at a 11 years interval.

This is grossly false.  Palindromic years occur at 11 year intervals at the *beginning* of the calendar (11, 22, 33...99), then at 10 year intervals (101, 111, 121...191, 202...292...909...999), then at 110 year intervals for the next nine millennia (1001, 1111, 1221...), then at 100 year intervals (10001, 10101, 10201... interleaved with 11011, 11111, 11211..., etc.) for the next ninety millennia.  Nothing special occurs at the end of each (of the first ten) millennia.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: gbrainy 1.41-1ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-25.44-generic
Uname: Linux 2.6.32-25-generic x86_64
Architecture: amd64
Date: Mon Oct  4 14:19:31 2010
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
PackageArchitecture: all
SourcePackage: gbrainy

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